Since having children, I have taken up running because I can push them along. Sometimes I push one kid in a running stroller, other times I push two kids in a small-wheeled stroller that offers much more resistance. I have been reading and developing the ChiRunning technique, which provides fairly detailed instructions about movement.

How can I adapt my running technique (ChiRunning specifically, or running technique in general) to accommodate pushing a stroller?

Some specific problems / questions that I am 'running' into:

One aspect of this method is to lean forward and use the constant state of falling for forward momentum. Does the backward resistance provided by the stroller mean that I should lean forward more/less/the same at a given speed?

What should I do with my arms and how close should my hands be to my body - there is the tendency for me to run into the stroller, but I can also keep it ahead of me with my elbows at 90 degrees and forearm perpendicular to the ground?

Is there any way in which I can benefit from using the stroller, for example by using the backward resistance to help me develop proper posture while leaning?

@Ivo - Summary of links:
Learning chi running with a stroller complicates the technique because the stroller interferes with your arm swing, limiting your upper body motion. The stroller adds resistance; and with something in front of you, it tends to inhibit the forward lean making you stand more upright.

They recommend the stroll-smart adaptor, a bar that helps you push forward from your center rather than pushing forward with your arms. It gives you the freedom and form that you are looking for with chi running.

If you are pushing a stroller without the stroll-smart adaptor, avoid tensing the arms and shoulders, and resist the tendency to stand more upright - use your core. You can switch off pushing arms. Continue the forward lean of the technique, keeping your legs relaxed.

@David - One last point to your question about bending the elbows. My study of Tai Chi addresses alignments and opening the joints to allow for the unrestricted flow of chi, so bending the elbows to 90 degrees may be too acute of an angle (in my understanding). Also, you want a feeling of widening at the shoulders and underarms. Go for that relaxed feeling of being propelled forward.